KECENT MEMOIRS ON FRESHWATER RHIZOPODA. 341 



off in the form of a bud. The division takes place along 

 ■with the capsule, not merely inside it. 



The author sometimes noticed in some of the largest of 

 these bodies delicate outlines of an irregular figure, as if the 

 contents had partially receded from the wall ; in other words, 

 as if a certain amount of amoeboid movement of the contents 

 had taken place. He sometimes, too, thought he had seen 

 the delicate outline of a nucleus. He could see no further 

 development of these bodies. It is probable they are expelled 

 at a certain stage of maturity. 



On one occasion the author placed an apparently defunct 

 example under the microscope ; it showed, in fact, a rugged, 

 almost crumbling appearance, manifestly near a break up. 

 But he was surprised to see a remarkable spectacle. Around 

 the whole outer margin of the Pelomyxa there came forth an 

 incalculable number of minute "Amoebae" surrounding the 

 mother-body in a thick, annularly arranged crowd. These 

 showed all the same habit, movements, and size. Each 

 showed a nucleus with nucleolus, and a contractile vesicle, 

 the latter mostly quite posterior (fig. 13). After its dis- 

 tinctly perceptible contraction several minute vesicles made 

 their appearance in the same place ; these gradually uniting, 

 reproduced the single vesicle of the original size. In about 

 half an hour their movements became weaker and slower. 

 In place of the vigorous amoeboid contractions of the whole 

 body, merely single hyaline lobes or finger-like processes 

 were extended (fig. 14) ; as they contracted one by one into a 

 globular or pyriform figure, a resting state set in. Then a 

 long vibrating filament was projected from the body, and so 

 the metamorphosis of the Amoeba into a flagellate form was 

 completed (fig. 15). After some rapid rotating movement 

 the author could not any further follow out their fate. 



The question arises whether these little Amoebse really 

 represented a development state of the Pelomyxa, and, 

 further, whether these originated from the shining bodies 

 (Glanzkorper) . 



The fact of the Amoebse issuing under the author's 

 eyes from the Pelomyxa-body, and in such great quantities, 

 he thinks, shuts out the idea that they were foreign or 

 parasitic bodies, whose germs had been merely previously in- 

 cepted. As to the second point, he likewise thinks there could 

 have been no other origin further than the shining bodies. 

 In the interior of the Pelomyxa example there occurred very 

 few of these in the normal state, but, on the other hand, 

 many paler bodies, which looked like their empty and col- 

 lapsed capsules. 



